10 results for “metal complexes”

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Research ArticleOpen accessPhrase in the titleSynthesis and Characterization of Dinuclear Metal Complexes Stabilized by Tetradentate Schiff Base LigandsEid A. Abdalrazaq, Omar M. Al-Ramadane, Khansa S. Al-NumaProblem statement: The synthesis, spectroscopic properties and theoretical calculations of acetylacetonimine and acetylacetanilidimine Schiff-base ligands, L1H and L2H, respectively and their dinuclear complexes of the type [M2LnCl2(H2O)2], where n = 1 or 2, M = Co(II), Ni(II), Cu(II), Zn(II) and Cd(II) are described. Approach: The new tetradentate dianion Schiff base ligand which was used as stabilizers for the complexes were … …American Journal of Applied Sciences, Vol. 7, Issue 5 · 31 May 2010 · 7,568 accessesView PDF Cite

Research ArticleOpen accessPhrase in the titleTransition Metal Complexes of Derivatized Chiral Dihydro-1,2,4-triazin-6-ones. Template Synthesis of Nickel(II) Tetraaza-(4N-M) Complexes Incorporating the Triazinone MoietyAhmad S. Abushamleh, Marwa M. Al-Aqarbeh, Vector DayTemplate reactions of (L)-3-acetyl-5-methyl-1-phenyl-4,5-dihydro-1,2,4-triazine-6- one (8a) or (L)-3-acetyl-5-benzyl-1-phenyl-4,5-dihydro-1,2,4-triazine-6-one (8b) with nickel(II) acetate in the presence of a suitable diamine such as: 1,3-diaminopropane, o-phenylenediamine, or ethylenediamine afforded square planar tetraaza nickel(II) complexes of the type 4N-M (Scheme 4). Single crystal X-ray structural analysis of one of the complexes (9b) revealed square planar geometry around the nickel ion and symmetrical coordination of … …American Journal of Applied Sciences, Vol. 5, Issue 6 · 30 Jun 2008 · 7,368 accessesView PDF Cite

Research ArticleOpen accessEvery word in the titleComplexes of 2-Thioacetic Acid Benzothiazole with Some Metal IonsEmad Yousif, Yang Farina, Khawla Kasar et al.New metal complexes of the ligand 2-thioacetic acid benzothiazole with the metal ions Ni(II), Cu(II), Zn(II), Cd(II) and Sn(II) were prepared in alcoholic medium. The prepared complexes were characterized by FTIR Spectroscopy, electronic spectroscopy, 1HNMR, 13CNMR, magnetic susceptibility and conductivity measurements. From the spectral measurements, monomer structures for the complexes were proposed. Square planar geometry was proposed for the copper … …American Journal of Applied Sciences, Vol. 6, Issue 4 · 30 Apr 2009 · 7,846 accessesView PDF Cite

Research ArticleOpen accessIn the abstractOptimization of Preparation Procedures of Phlorizin-Zn (Ⅱ) Complex and Its Antioxidant Activity Study in vitroYuqing Zhang, Yaping Li, Guorui Yang et al.Flavonoid metal complexes possess more effective antioxidant properties than flavonoids. However, the preparation of the phlorizin-Zn (Ⅱ) complex and its antioxidant activity has not been reported. In this research, the preparation procedures of the phlorizin-Zn (Ⅱ) complex were enhanced using by single factor test and Response Surface Methodology (RSM). The optimal preparation procedures of the phlorizin-Zn (II) complex were as … …American Journal of Biochemistry and Biotechnology, Vol. 19, Issue 4 · 3 Apr 2024 · 4,758 accessesView PDF Cite

Research ArticleOpen accessIn the abstractQuercetin Iron (III) Complex Enhances Radiation-Induced Cell Death in Human Erythroleukemic Cell Lines by Increasing the Generation of Intracellular ROSJiraporn Kantapan, Krai Daowtak, Kachaporn Gateprayoon et al.Quercetin iron (III) complex (IronQ) is a paramagnetic agent which exhibits several biological effects. Despite extensive studies about quercetin metal complex, the role of complexes to enhance the effect of radiation still remains unexplored. To this end, we determined whether and how IronQ sensitizes cancer cells to Ionizing Radiation (IR). Doxorubicin resistant leukemic cells (K562/Adr) and their parental cell lines … …American Journal of Applied Sciences, Vol. 14, Issue 1 · 16 Jan 2017 · 8,064 accessesView PDF Cite

HypothesisOpen accessIn the abstractCan Anthocyanins be Part of the Metal Homeostasis Network in Plant?Marco LandiAnthocyanins are a class of flavonoids with a high level of diversification and likely the most studied pathway of secondary metabolism in Plantae. Anthocyanins have raised a growing interest due to the huge variability of their chemical structures and the more new anthocyanins are isolated from plants, the more questions on their evolutionary and ecological meaning they raise. Antioxidant, photoprotection … …American Journal of Agricultural and Biological Sciences, Vol. 10, Issue 4 · 9 Dec 2015 · 8,568 accessesView PDF Cite

Research ArticleOpen accessIn the abstractInvestigation into the Use of Electrochemical Extraction to Draw Gold from Refractory OresBagdaulet Kenzhalyevich Kenzhaliyev, Zamzagul Duisenovna Dosymbaeva, Renata Ramilevna Iskhakova, Essen Nurgalievich SuleimenovThis paper studies the possibility of extracting gold by electrochemical leaching through the use of a sodium thiosulfate solution. In this regard, the requirements for environmentally sound technologies play a huge and vital role. Low extraction ratios and metal losses increase the cost of this process significantly and therefore it is necessary to reduce or prevent these disadvantages. Dissolution of … …American Journal of Applied Sciences, Vol. 12, Issue 11 · 17 Nov 2015 · 6,681 accessesView PDF Cite

Research ArticleOpen accessIn the abstractAbolishing Toxicity of Copper by Some Environmental Factors Using Green Alga Chlorella vulgarisAdel A. Fathi, Mohamed M. Azooz, Mohamed A. Al-FredanA variety of environmental factors are known to modify the toxicity of heavy metals on algae. This study was undertaken to examine the impact of some inorganic and organic complexes on the toxicity of copper using the isolated algal species (Chlorella vulgaris). The data illustrate that the amount of available forms of copper (copper free ions) gradually decreased with increasing … …American Journal of Environmental Sciences, Vol. 8, Issue 6 · 2 Jan 2013 · 6,757 accessesView PDF Cite

Research ArticleOpen accessIn the abstractA Typical Case Study: Solid Waste Management in Petroleum RefineriesJadea S. Alshammari, Fatma K. Gad, Ahmed A.M. Elgibaly, Abdul Rehman KhanThe current environmental concerns have forced developed and developing countries to reduce air, water and land pollution for sustainable growth. Solid refinery waste is cocktail of hydrocarbons, water, heavy metal and fine solids and is substantial in quantity. The principal processes of waste management focus mainly on waste source reduction, reusing, recycling, composting, incineration with or without energy recovery, fuel … …American Journal of Environmental Sciences, Vol. 4, Issue 4 · 31 Aug 2008 · 9,767 accessesView PDF Cite

Research ArticleOpen accessIn the abstractStability of Neodymium(III) Complexes of 4-Hydroxycoumarins with Anticoagulant ActivityIrena Kostova, Irina NikolovaComplexes of neodymium(III) with 4-hydroxy-3-(3-oxo-1-phenylbutyl)-2H-1-benzopyran-2-one, 4-hydroxy-3-[1-(4-chlorophenyl)-3-oxobutyl]-2H-1-benzopyran-2-one and 4-hydroxy-3-[1-(4-nitrophenyl)-3-oxobutyl]-2H-1-benzopyran-2-one were synthesized by mixing of water solutions of neodymium(III) nitrate and the respective ligands, in amounts equal to metal: ligand molar ratio of 1: 3. The complexes were characterized and identified by elemental analysis, conductivity, IR and 1H NMR spectral data. DTA and TGA have been applied to confirm the compositions of … …American Journal of Pharmacology and Toxicology, Vol. 1, Issue 2 · 30 Jun 2006 · 7,554 accessesView PDF Cite